% 严格按照作图的步骤绘制
\begin{tikzpicture}
    \tkzDefPoints{0/0/A, 4/0/B, 2/1.5/C}
    \tkzDrawSegments(A,B)
    \tkzLabelPoints[below](A,B)
    \tkzDrawPoint(C)
    \tkzLabelPoints[right](C)

    % 1
    \tkzDefPoints{1.5/-0.5/K}
    \tkzDrawPoint(K)
    \tkzLabelPoints[below](K)

    % 2
    \tkzCalcLength(C,K)  \tkzGetLength{ck}
    \pgfmathsetmacro{\r}{\ck}
    \tkzInterLC[R](A,B)(C,\r)  \tkzGetPoints{D}{E}
    \tkzLabelPoints[above](D,E)
    \tkzDrawArc[delta=10](C,D)(E)

    % 3
    \tkzCalcLength(D,E)  \tkzGetLength{de}
    \pgfmathsetmacro{\r}{0.75*\de}
    \tkzInterCC[R](D,\r)(E,\r)  \tkzGetSecondPoint{F}
    \tkzDrawPoint(F)
    \tkzCompasss(D,F  E,F)
    \tkzLabelPoints[right=0.3em](F)

    % 4
    \tkzDrawLine[add=0.2 and 0.2](C,F)
\end{tikzpicture}

